.clear:after {
    content: '';
    display: block;
    clear: both;
}

.mingcheng {
    width: 100%;
    height: 280px;
    background-color: rgb(253, 104, 70);
    position: relative;
}

.mingcheng>.imgimg {
    width: 100px;
    height: 100px;
    background-color: white;
    position: absolute;
    top: 15px;
    left: 20px;
}

.mingcheng>.imgimg>img {
    width: 100%;
    height: 100%;
}

.name_shangjia {
    position: absolute;
    top: 15px;
    left: 130px;
}

.left_connet {
    position: absolute;
    top: 160px;
    left: 20px;
}

.right_connet {
    position: absolute;
    top: 160px;
    right: 20px;
}

.add_a {
    width: 100%;
    height: 100%;
    background-color: white;
}

.add_a_left {
    float: left;
}

.add_a_right {
    float: right;
}

.add_b {
    width: 100%;
    height: 100%;
    margin: 20% 0 0 0;
    background-color: white;
}

.add_b_left {
    float: left;
    width: 200px;
}

.add_b_right {
    float: right;
}

.zxc {
    margin: 20% 0 0 0;
    text-align: center;
    background-color: white;
}